Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of human A549 cell line activated with either cyclic stretch (20% elongation), tumor necrosis factor or lipopolysaccharide

ABSTRACT: Alveolar epithalial cells (A549) were used as a model of pulmonary parenchymal cell activation to quiery gene expression profile of activation with either cyclic stretch (20% elongation), TNF (20 ng/ml), LPS (1 mcg/ml) or TNF+STRETCH at both 1 and 4 hrs.

ORGANISM(S): Homo sapiens

SUBMITTER: Claudia Chimisso dos Santos

PROVIDER: E-GEOD-1541 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

DNA microarray analysis of gene expression in alveolar epithelial cells in response to TNFalpha, LPS, and cyclic stretch.

dos Santos C C CC Han B B Andrade C F CF Bai X X Uhlig S S Hubmayr R R Tsang M M Lodyga M M Keshavjee S S Slutsky A S AS Liu M M

Physiological genomics 20040928 3

Recent evidence suggests that alveolar epithelial cells (AECs) may contribute to the development, propagation, and resolution of acute lung injury (ALI)/acute respiratory distress syndrome (ARDS). Proinflammatory cytokines, pathogen products, and injurious mechanical ventilation are important contributors of excessive inflammatory responses in the lung. In the present study, we used cDNA microarrays to define the gene expression patterns of A549 cells (an AEC line) in the early stages of three m ...[more]

PMID: 15454581

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Project description:Acute respiratory distress syndrome (ARDS) is a catastrophic form of acute lung injury (ALI). The necessity for mechanical ventilation (MV) renders patients at risk for ventilator induced lung injury (VILI). Exposure to repetitive cyclic stretch (CS) and/or over-inflation exacerbates injury. Reducing tidal volume (VT) is the only therapeutic strategy shown to mitigate morbidity and mortality. Cyclic stretch has been shown to differentially regulate gene expression in part through the activation of mammalian mitogen-activated protein kinase (MAPK). Although these studies have shown both molecular and cellular alterations, no unifying hypothesis to explain MV-induced lung injury has emerged. In the current study, we hypothesized that coordinated expression of cyclic stretch (CS)-responsive genes relies on the presence of common CS-sensitive regulatory elements. To identify CS-responsive genes, we undertook a comparative examination of the gene expression profile of human bronchial epithelial airway (Beas-2B) cells in response to various injurious stimuli involved in the pathogenesis of acute lung injury (ALI)/Ventilator induced lung injury (VILI): cyclic stretch, tumor necrosis factor alpha (TNF-a), and lipopolysaccharide (LPS). Experiment Overall Design: Human Bronchial Epithelial Cells (Beas-B2) cells grown on silicon elastic plates coated with Type I collagen (Flexercell International, McKeesport, PA) were exposed to six regiments for 4 h: 1) control (static, [control]); 2) mechanical stretch (25 PKa, 30 cycles per min, [stretch]); 3) LPS (1 mcg/ml [LPS]); 4) TNF-Î± (20 ng/ml; [TNF]); 5) mechanical stretch plus LPS [LPS+S], and 6) mechanical stretch plus TNF-Î± [TNF+S]. Total RNA (duplicate experiments) was extracted using TRIZOL reagent (as per manufactures specifications) and purified using Qiagen mRNA purification Kit (as per manufacturers specifications). mRNA was hybridized to Affymetrix Human U133plus2.0 chips. Probe based analysis, background reduction, and quantile data normalization was performed in MeV 4.0 of TM4 using Robust Multi-array Average (RMA).

Dataset Information

Transcription profiling of human A549 cell line activated with either cyclic stretch (20% elongation), tumor necrosis factor or lipopolysaccharide

Publications

DNA microarray analysis of gene expression in alveolar epithelial cells in response to TNFalpha, LPS, and cyclic stretch.

Similar Datasets

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